Title:
DIAGNOSIS METHOD FOR INFLOW INFILTRATION OF DRAINAGE PIPELINE BASED ON OPTICAL FIBER DISTRIBUTED TEMPERATURE MEASUREMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/179057
Kind Code:
A1
Abstract:
The present invention relates to a diagnosis method for inflow infiltration of a drainage pipeline based on an optical fiber distributed temperature measurement system. The method comprises the following steps: S1, an optical time domain reflectometer transmitting an original optical signal into a temperature-sensing optical fiber cable arranged in a drainage pipeline; S2, after being affected by a temperature, the temperature-sensing optical fiber cable feeding back a modulated optical signal to the optical time domain reflectometer; S3, a distributed optical fiber thermodetector performing photoelectric conversion on the modulated optical signal, so as to convert same into corresponding binary information representing a measurement time, a measurement temperature and an optical fiber position; S4, a data interpretation module converting the binary information into decimal information; S5, drawing a water temperature space-time graph in the pipeline according to the decimal information; and S6, eliminating a background noise value of the water temperature space-time graph, discovering an abnormal water temperature point, determining an inflow infiltration point of the pipeline, and acquiring an abnormal inflow infiltration point of the drainage pipeline. Compared with the prior art, the present invention has the characteristics of being capable of performing a high water-level operation and high-frequency continuous monitoring, and having low costs and accurate positioning.
Inventors:
YIN HAILONG (CN)
XU ZUXIN (CN)
GUO LONGTIAN (CN)
XIE MING (CN)
XU ZUXIN (CN)
GUO LONGTIAN (CN)
XIE MING (CN)
Application Number:
PCT/CN2021/111832
Publication Date:
September 01, 2022
Filing Date:
August 10, 2021
Export Citation:
Assignee:
UNIV TONGJI (CN)
International Classes:
G01K11/32; G01N13/04; G01N15/08
Foreign References:
| CN113029382A | 2021-06-25 | |||
| CN105805556A | 2016-07-27 | |||
| CN107101743A | 2017-08-29 | |||
| CN110333673A | 2019-10-15 |
Attorney, Agent or Firm:
RZBC PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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